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the cell in action
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Term | Definition |
---|---|
diffusion | the movment of partcles from regions of higer destiny to regiouns of lower density |
osmosis | the diffusion of water through a semipermeale membrain |
passive transport | the movment of substances across a cell membrane without the use of energy by the cell |
active transport | the movment of substances across the sell membrane that requires the cell to use energy |
endocytosis | the process by which a cell membrane surrounds a particle and encloses the particle in a vesicle to bring the a paricle into the cell |
exocytosis | the process in which a cell releases a particle by enclosing in the particle in a vesicle that then moves to the cell sureface and fuses with the cell membrane |
photosynthesis | the process by which plants, alage, and some bacteria use sunlight, carbon dioxide, and water to make food |
cellular resperation | the process by which cells use oxygen to produce energy from food |
fermentation | the breakdown of foor without the use of oxygen |
cell cycle | the life cycle of a cell |
chromosomes | in the eukaryotic cell, one of the structures in the nucleus that are made up of DNA and protein; in prokaryotic cell, the main ring of DNA |
homologous chromosomes | chromosomes that have the same sequence of genes and the same structure |
mitosis | in eukaryotic cells, a process of cell division that forms two new nuclei, each of which has the same mumber of chromosomes |
cytokinesis | the divion of cytoplasm of a cell |